From 43cae9ac71f2d6933ba3ea25641585bb88ae60ad Mon Sep 17 00:00:00 2001
From: Kai Stevenson <kai@kaistevenson.com>
Date: Sat, 15 Aug 2026 17:59:17 -0700
Subject: working, performance is bad

---
 src/shader.wgsl | 29 ++++++++++++++++++++++++-----
 1 file changed, 24 insertions(+), 5 deletions(-)

(limited to 'src/shader.wgsl')

diff --git a/src/shader.wgsl b/src/shader.wgsl
index e545dac..6adcda8 100644
--- a/src/shader.wgsl
+++ b/src/shader.wgsl
@@ -1,4 +1,16 @@
-@group(0) @binding(0) var tex: texture_2d<f32>;
+struct ChunkData {
+    origin: vec2<i32>,
+};
+
+var<immediate> chunk: ChunkData;
+
+struct Camera {
+    scale: vec2f,
+    centre: vec2f,
+};
+
+@group(0) @binding(0) var<uniform> camera: Camera;
+@group(1) @binding(0) var tex: texture_2d<f32>;
 
 struct VertexOutput {
     @builtin(position) clip_position: vec4<f32>,
@@ -10,16 +22,23 @@ fn vs_main(
     @builtin(vertex_index) i: u32,
 ) -> VertexOutput {
     var out: VertexOutput;
-    let uv = vec2f(f32((i << 1u) & 2u), f32(i & 2u));
-    out.clip_position = vec4f(uv.x * 2.0 - 1.0, 1.0 - uv.y * 2.0, 0.0, 1.0);
-    out.uv = uv;
+    // (0,0),(1,0),(0,1),(1,1)
+    let corner = vec2f(f32(i & 1u), f32(i >> 1u));
+
+    // CHUNK_SIZE
+    let world = (vec2f(chunk.origin) + corner) * 32.0;
+    let ndc = (world - camera.centre) * camera.scale;
+
+    out.clip_position = vec4f(ndc, 0.0, 1.0);
+    out.uv = corner;
 
     return out;
 }
 
 @fragment
 fn fs_main(in: VertexOutput) -> @location(0) vec4<f32> {
-    let dims = vec2f(textureDimensions(tex));
+    // CHUNK_SIZE
+    let dims = vec2f(32.0, 32.0);
     return textureLoad(tex, vec2i(in.uv * dims), 0);
     // return vec4f(0.0, 1.0, 0.0, 1.0);
 }
\ No newline at end of file
-- 
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